#include <stdio.h>
int main(){
    int sum=10;
    printf("sum=%d\n",sum);
    char sigleChar='A';
    printf("sigleChar=%c\n",sigleChar);
    float a=0.3f;
    printf("a=%f\n",a);
    double b=0.0002;
    printf("b=%lf\n",b);
    return 0;
}